Foundations of Crystallography

 

Acta Cryst. (2007). A63, 1-10  [ doi:10.1107/S0108767306041298 ]

A symmetrical indexing scheme for decagonal quasicrystals analogous to Miller-Bravais indexing of hexagonal crystals

S. Ranganathan, E. A. Lord, N. K. Mukhopadhyay and A. Singh

Synopsis: An indexing scheme for decagonal quasicrystals, analogous to the Miller-Bravais indexing of hexagonal crystals, is proposed and compared with other decagonal schemes. The status of the zone law for decagonal quasicrystals is discussed and elucidated.

Online 19 December 2006

 

Acta Cryst. (2007). A63, 11-29  [ doi:10.1107/S0108767306044291 ]

Multiple twinning in cubic crystals: geometric/algebraic study and its application for the identification of the 3ⁿ grain boundaries

C. Cayron

Synopsis: Multiple twinning in cubic crystals is represented geometrically by three-dimensional fractals and algebraically by groupoids. The groupoid composition table can be used to identify the 3ⁿ grain boundaries in EBSD maps.

Online 19 December 2006

 

Acta Cryst. (2007). A63, 30-35  [ doi:10.1107/S0108767306046976 ]

Simultaneous fitting of X-ray and neutron diffuse scattering data

D. J. Goossens, T. R. Welberry, A. P. Heerdegen and M. J. Gutmann

Synopsis: This paper presents the refinement of a structural model based on X-ray and neutron diffuse scattering data, which promises to give unprecedented insights into nanoscale order in materials.

Online 19 December 2006

 

Acta Cryst. (2007). A63, 36-42  [ doi:10.1107/S0108767306047209 ]

Effectiveness of iterative algorithms in recovering phase in the presence of noise

G. Williams, M. Pfeifer, I. Vartanyants and I. Robinson

Synopsis: The effect of noise specific to coherent X-ray diffraction imaging experiments on the iterative algorithms typically used to solve the phase problem in this context is explored.

Online 19 December 2006

 

Acta Cryst. (2007). A63, 43-52  [ doi:10.1107/S0108767306047210 ]

Accurate structure factors and experimental charge densities from synchrotron X-ray powder diffraction data at SPring-8

E. Nishibori, E. Sunaoshi, A. Yoshida, S. Aoyagi, K. Kato, M. Takata and M. Sakata

Synopsis: Accurate structure factors of silicon and diamond have been determined from powder diffraction data measured at SPring-8, BL02B2. The accuracy of structure factors is evaluated. The usefulness of the present structure factors is also reported.

Online 19 December 2006

 

Acta Cryst. (2007). A63, 53-65  [ doi:10.1107/S0108767306047702 ]

Infinite geodesic paths and fibers, new topological invariants in periodic graphs

J.-G. Eon

Synopsis: Minimal 1-periodic subgraphs are shown to play important roles as topological invariants of crystallographic nets and other periodic graphs.

Online 19 December 2006

 

Acta Cryst. (2007). A63, 66-76  [ doi:10.1107/S0108767306049579 ]

Direct Bragg-peak phase retrieval by a hybrid-input-output algorithm with proper intensity normalization

N. Lei

Synopsis: With Bragg peaks normalized to those of solid spheres of uniform electron density, a dual-space iteration-based algorithm is applied to successfully reconstruct hypothetical 500- and 1000-atom carbon cluster crystal structures at both high and low resolutions.

Online 19 December 2006

 

Acta Cryst. (2007). A63, 77-79  [ doi:10.1107/S0108767306046319 ]

Transformational space-group symbols

K. Stróz

Synopsis: A transformational space-group symbol (TSG) composed of the well defined standard space-group identifier, an explicitly given axis system transformation and an origin shift is proposed to designate any space-group description.

Online 19 December 2006

 

Acta Cryst. (2007). A63, 80  [ doi:10.1107/S0108767306053992 ]

Nominations for the Ewald Prize

Online 19 December 2006

 

Acta Cryst. (2007). A63, 81-86  [ doi:10.1107/S0108767306050689 ]

Notes for authors 2007

Online 19 December 2006